Stethoscope.



310. 824,450. PATENTED JUNE 26, 1906.

T. W. TALLQVIST. STETHOSCOPE.

APPLICATION FILED 0GT.7, 1905.

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THEODGR VVALDEMAR TALLQVXST, OF HELSINGFORS, RUSSIA.

n scenes.

Specification of Letters Patent.

Application filedOotober 7, 1905.

Patented June 26, 1906. I

stun No. 281,813. I

To all whom it may concern:

Be it known that I, Tnnonon lVA'LDEMnR TALL vIsr, doctor of medicin asubject of the Emperor of Russia, residing in Helsing-- ready for use,the instrument being so con structed es .130 form a single piecewithout'any loose parts, and,i'urther, that the tube of the .stethoscopemay at the same time serve as a,

holder for a chemical thermometer.

The

usual instruments for examination which a doctor always carries with himare thus com prised in a single apparatus.

The invention is shown in the annexed drawings, wherein- Figure 1 showsthe stethoscope with folded disk in the shape it has when carried in thezontal projection oi. Fig. 3.

pocket.

Fig. 2 shows avertical section of the stethoscope. The thermometer ishere shown, in dotted lines. Fig. 3 shows the stethoscope ready for use.Fig. 4 is a hori- The disk,'which as in other stethoscop-es can be madeof metal, wood, or other suitable material, is made either fiat orconcave on the sidewhich lies against the ear of the center piece.

.doctor., The concave shape is the usual one and is shown in thedrawings, Fig. 2.

As is seen from the enncxed drawings, the

disk is'made in three parts, a center aand two side pieces I), which areln'n ed to the There are four 'nges, of which two, 0, are long and two,d, short to make it possible to turn the tube through ninet'* degrees.The center piece a," which like t e side pieces I) is lot on the sidenearest I thetube f, has a tubular flanged center .2,

which fits into a corresponding hollow in the tube f. The center piecea, is fastened to the flanged tubular piece 6 by the flanges of the tubeg, which is fixes and prevented from turning by the pin it. The centerpiece a and the side pieces 5, fastened thereto by the hinges c and d,can, when the latter are opened out .to lie in the same plane as thecenter. piece a, be turned round on the end of the tubef, but not morethan ninety degrees, because the ends of the hinges c abut against thesides of the wider part 19 of the tube, Figs.

2 and 4. Through the stiffness of the h'nges the side pieces I) are heldin the position shown in Fig, 1 when folded up,

Nhen the stethoscope is to be used, the side pieces 5 are folded out,shown in Fig. 4, whet-setter the tube turned round through an angle ofninety degrees. The lower enlargement p of the tube 7, which liesagainst the disk, is list and will lie across the center piece a and theside pieces I), which cannot then be folded up. The stethoscope is nowready for use. The enlargement of the tube f is provided with twogrooves c, in which the hinges lie when the side pieces I) are foldedup, and these hinges c prevent the turning of the tube f more thanninety degrees. The shorter hinges d, however, do not prevent the tube ffrom being turned round, Fig. 4. The tube f is provided with a pin Zwhenit is used as s holder for a feverthermomoter, the point of thethermometer resting against this pin. To 'holdthe thermometer, there aretwo springs m and n in the upper pert of the tube}, these spr ngs beeterof the tube f is made of such a size that the sound-waves have ampleroom to go through, and the stethoscope can therefore be used even ifthe thermometer is in it. The thermometer is so fixed by the springsthat it does not rattle or cause disturbing noises when the stethoscopeis in use;

I declare that what I claim is l 1. In a stethoscope a tube, a centerpiece secured to said tube two hinged pieces se cured to-seid centerpiece and adapted to fold back over said tube, ssid centerpiece andhinged pieces forming the usual d sk of the stethoscope means forlocking said hinged pieces in their outward position.

2. In a stethoscope a tube, a centerpiece rotatably mounted on one endof said tube, two hinged pieces secured to said center piece and adaptedto fold back over said tr J, 5 d center piece and hinged. pieces fOll.ng ne usual disk of the stethoscope, side pro ecticns on said tubeabutting against said disk,

means for permitting a partial rotation of: i

said side projections relative to said disk.

In a stethoscope a tube means for re movsbly holding a thermometerwithin sold seeds-e tube, said means comprising a pin located acrosssaid tube and e hand-released spring dGYlGQ situeted at one end or saidtube, a

folding disk secured to said tube and meens for locking said foldingdisk in its open pose tion.

4. In a stetheseo e, a tube the usual disk 7 at one endoi' said tu e, ecenter part and two hinged uiee'es comprising said disk means forrotation of said disk relative to said tube, and means in one positionof said for holding said hinge-pieces flush with said center piece.

said hinged pieces out of the path of said pro jections and one hinge oneach of said hinged pieces inthepath of said projections for the purpose[described 6. In a stethoscope a tube, a second small tube inserted andheid in said first tube, an annular flange on said second tube, s diskcomprising a center and two side hinged pieces said center piece takingover and rotetable on said flange, projections on said tube, stops onsaid disk substantially as and for the purpose described.

In witness whereof I have hereunto signed THY name, this 9th day ofSeptember, 1905', in

the presence of two subscribing Witnesses. v THEODOE WALDEPLLRTALLQVIST. Witnesses:

VrcTc-u EK, Oscim SANDsTsoM.

